Question

1. circle the letter of each substance that dissolves in water. a. salt b. oil c. oxygen d. wax 16. a substance that hates, or “fears” water is called 17. the amount of heat needed to increase the temperature of a certain mass of a substance by 1°c is its 18. true or false? compared with other substances, water requires a lot of heat to increase its temperature. 19. circle the letter of each sentence that is true about water’s specific heat. a. it is due to the many attractions among water molecules. b. it makes large bodies of water heat up more quickly than nearby land. c. it makes large bodies of water cool off more slowly than nearby land. d. it leads to warmer air over land than over water on summer days. 20. how does the high specific heat of water affect your body?

Explanation:

1. Salt is an ionic compound that dissociates in water due to the polar nature of water molecules. Other substances like oil are non - polar and do not dissolve in water, oxygen is a gas that has limited solubility, and wax is a non - polar solid.
2. Substances that do not mix well with water are called hydrophobic (literally "water - fearing").
3. Specific heat is the amount of heat needed to increase the temperature of a unit mass of a substance by 1°C.
4. Water has a high specific heat because of the many hydrogen bonds (attractions) among water molecules. It requires a lot of heat to increase its temperature. Compared with other substances, this is true.
5. Water's high specific heat means large bodies of water heat up more slowly and cool off more slowly than nearby land. This affects local climates. In summer, the air over water is cooler than over land, and in winter, the air over water is warmer than over land.
6. The high specific heat of water helps regulate body temperature. Water in our bodies can absorb or release a large amount of heat with a relatively small change in temperature, acting as a buffer against rapid temperature changes.

Answer:

1. a. salt
2. hydrophobic
3. specific heat
4. True
5. c. It makes large bodies of water cool off more slowly than nearby land.
6. It helps regulate body temperature by absorbing or releasing heat with small temperature changes.